SUSE: 2019:0740-1 important: the Linux Kernel (Live Patch 1 for SLE 15)
Summary
This update for the Linux Kernel 4.12.14-25_3 fixes several issues. The following security issues were fixed: - CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bsc#1128378). - CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a NULL value for a certain structure member, which could have led to a use-after-free in sockfs_setattr (bsc#1126284). - CVE-2018-12232: In net/socket.c there was a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat did not increment the file descriptor reference count, which allowed close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash (bsc#1127757). - CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124734). - CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bsc#1124729). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: - SUSE Linux Enterprise Module for Live Patching 15: zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2019-740=1 SUSE-SLE-Module-Live-Patching-15-2019-746=1 Package List: - SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64): kernel-livepatch-4_12_14-23-default-9-25.2 kernel-livepatch-4_12_14-23-default-debuginfo-9-25.2 kernel-livepatch-4_12_14-25_3-default-8-2.1 kernel-livepatch-4_12_14-25_3-default-debuginfo-8-2.1 kernel-livepatch-SLE15_Update_0-debugsource-9-25.2
References
#1124729 #1124734 #1126284 #1127757 #1128378
Cross- CVE-2018-12232 CVE-2019-6974 CVE-2019-7221
CVE-2019-8912 CVE-2019-9213
Affected Products:
SUSE Linux Enterprise Module for Live Patching 15
https://www.suse.com/security/cve/CVE-2018-12232.html
https://www.suse.com/security/cve/CVE-2019-6974.html
https://www.suse.com/security/cve/CVE-2019-7221.html
https://www.suse.com/security/cve/CVE-2019-8912.html
https://www.suse.com/security/cve/CVE-2019-9213.html
https://bugzilla.suse.com/1124729
https://bugzilla.suse.com/1124734
https://bugzilla.suse.com/1126284
https://bugzilla.suse.com/1127757
https://bugzilla.suse.com/1128378